A Power Monitoring Relay is an advanced electrical device that combines multiple protection and monitoring functions in a single unit. It typically monitors a wide range of electrical parameters to safeguard electrical equipment and systems from hazardous conditions, such as overloads, under-voltage, over-voltage, and frequency fluctuations. In industrial, commercial, and residential settings, these relays act as the first line of defense, automatically disconnecting the power supply when it detects an abnormal condition, thereby protecting valuable equipment from damage.